CN201626433U - Reliable power supplying system having standby circuit for railway system - Google Patents

Abstract

The utility model belongs to an accessory for a railway power supplying system. In order to solve the problem of the traditional power supply system that the fault detection has a dead zone, the utility model provides a reliable power supplying system having a standby circuit for a railway system, which has a novel structure, is capable of covering the dead zone by moving the detected sample point backwards and works stably, accurately and safely. The system has a voltage collecting control unit comprises a sample detecting part, a self-locking part, a mutual-locking part and an executing part, wherein the sample detecting part comprises a rectification block, a light control switch and a switch tube; the self-locking part comprises a micro relay loaded the switch tube; the mutual-locking part comprises a diode with the switch tube collector reversely connected to another base; and the executing part comprises a relay for controlling the standby circuit. Self-locking ensures the stable power supply of the standby circuit after fault occurs. The mutual-locking ensures that only one fault circuit can be connected to the standby circuit so as to avoid mixing with the primary circuit.

Description

The highly reliable electric power system that has a cover redundant circuit that the railway system uses

Technical field: a kind of annex that the invention belongs to the railway power supply system.It is specifically related to the highly reliable electric power system that has cover (N+1) redundant circuit that a kind of railway system uses.

Background technology: the modern railways vehicle has at a high speed, intensive characteristics, so the various device of the railway system and signal all require accurately, require therefore that each is stood, on the some supply of power supply very reliable.All be provided with detection part in each power supply unit inside, breaking down in time to adopt when detected power supply supply switches to the redundant circuit power supply state, to guarantee normal operation, guarantees the safety of the railway system for this reason.Therefore, the power supply panel of electric power system is the key equipment of railway security operation on the railway.The detection of the power supply trouble in the prior art, can only be limited to inside to this modular unit, and distribution terminal, isolating transformer, switch, the wire nipple of module rear, even the input switching device of active/standby mode (as the contactless switch contact) all becomes and detects the blind area, breaks down and will produce the major accident of system blackout in this position.

Summary of the invention: the present invention proposes for overcoming the deficiency that the power supply panel self check exists in the prior art---the highly reliable electric power system that has a cover redundant circuit that the railway system uses, it adopts new structure, make the stand-by power supply circuit of N+1, cover aforesaid detection blind area, to guarantee safe operation.

By as above design, the highly reliable electric power system that has a cover redundant circuit that the railway system that this programme proposed uses, the voltage acquisition control unit that it is characterized in that it is made up of detection, interlocking, self-locking, execution four parts, its test section is made up of rectifying circuit, photoswitch 1U1 and switching valve 1Q1, its rectifying circuit connects main lead-out terminal with circuit, the dc terminal of putting in order out meets photoswitch 1U1 through filter, its output connects the base stage of switching valve 1Q1 through stabilivolt 1Z1, to detect whether main lead-out terminal with circuit is charged mode of operation; Latching circuit is made up of the midget relay 1JQX1 of switching valve 1Q1 control, and the conducting of switching valve 1Q1 makes midget relay 1JQX1 devote oneself to work, and its an open contact ground connection maintains midget relay 1JQX1 and is stabilized in mode of operation; Interlock circuit is oppositely to insert diode 2D4 between the base stage of the collecting electrode of testing circuit switching valve 1Q1 and detector switch pipe 2Q1, and oppositely insert diode 1D4 between the base stage of the collecting electrode of testing circuit switching valve 2Q1 and detector switch pipe 1Q1, with the active potential of the switching valve collecting electrode of conducting the base potential of another pipe is dropped to 0; Its operating part is made up of the relay 1JQX2 of midget relay 1JQX1 and operating part, when midget relay work makes the relay of operating part devote oneself to work, redundant circuit connect to.

Adopt this programme can embody following preceence: it is a plurality of 1. to be provided with main testing circuit with circuit at this voltage acquisition control unit, one in stand-by power supply circuit, be the structure of N+1, certain main lead-out terminal that causes with any element fault of circuit does not have, just can switch to the redundant circuit power supply at once, the reliability of assurance system power supply; 2. switching valve conducting when certain master uses fault, make midget relay work, an its open contact closure, make the lower end ground connection of midget relay, the state variation of 1Q1 switching valve formed stable mode of operation, even also can not influence the state of midget relay, realize self-locking, guarantee the redundant circuit stable power-supplying; 3. main with fault during the redundant circuit power supply at certain, other master is broken down and can not be closed the spare circuit again with circuit, it is powered simultaneously, its interlock circuit is that the fault master is dropped to 0 to the base potential of other switching valve with the active potential of the collecting electrode of circuit turn-on 1Q1, make it can not conducting, there has been interlock circuit to avoid a plurality of masters to connect with redundant circuit simultaneously, occurred mixing electricity, causing other fault with circuit; 4. can not untie automatically after a latching circuit pins, operating personal in time trouble-shooting and people be release, and avoiding redundant circuit is a circuit service for a long time, can not realize when avoiding another fault that redundant circuit is powered, prolongation downtime; 5. the characteristics of this programme are to move on to main lead-out terminal with circuit behind the check point, to detect accurately, to have overcome aforesaid detection blind area, to improve the probability of safe operation.

Description of drawings: Fig. 1 is the electrical schematic diagram of core voltage acquisition control unit of the highly reliable electric power system that has a cover redundant circuit used of this programme railway system.

Fig. 2 is an electric power system electrical schematic diagram in the prior art.

Fig. 3 is the schematic diagram of the N+1 redundant circuit electric power system of this programme.

The specific embodiment: this programme is the improvement that electric power system in the prior art is existed the insufficient problem of self check.The original technical scheme that in Fig. 2, shows, current consumer or contactless switch 1KA, 2KA detect and the operation of two power supplys of interlocking, exist isolating transformer, and the detection blind area of part such as contact, and this part has had fault also to can't find.This programme is to move behind the check point, uses the voltage acquisition control unit of new structure, has realized the purpose of long-term safety operation.This voltage acquisition control unit is by the test section, formed from latching segment, interlocking portions and operating part.In concrete circuit, take a sample in main lead-out terminal with circuit, through rectifying block, filter, meet photoswitch 1U1, the output of 1U1 connects the base stage of switching valve 1Q1 through stabilivolt 1Z1, the load of switching valve is midget relay 1JQX1, this relay has two pairs of contacts, and an open contact is done self-locking usefulness, and another open contact is done the earthy of the relay 1JQX2 that starts operating part.

During work, when a certain master does not have electricity with fault, not conducting of photoswitch, 4 of its output is high potential, causes switching valve 1Q1 conducting, the 1JQX1 adhesive makes its lower end ground connection, makes relay be in stable mode of operation, promptly realizes its auto-lock function.Another open contact of relay 1JQX1 makes the lower end ground connection of relay 1JQX2 of operating part and adhesive, realize redundant circuit to main with circuit 1 power supply.On a plurality of main testing circuits, be provided with the interlocking measure with circuit, be oppositely to be connected between the base stage of collecting electrode and another pipe of each switching valve with diode 1D4,2D4, the active potential that makes the actuating switch pipe collector is reduced to 0 with the current potential of the base stage of other pipe, make another pipe can not conducting, thereby another loop can not be dropped into, realize interlocking, reach redundant circuit can not be used circuit supply simultaneously to the master of a plurality of faults purpose.One the tunnel has hospital circuit when power supply, and other is main can not realize the interlock function of redundant circuit power supply with circuit, can avoid main with mixed between circuit.Should must be release the trouble-shooting descendant from latching segment, require promptly to guarantee that redundant circuit can not be that a certain master uses circuit supply chronically, influence standby functions.In the drawings, 1 for probe inspection part, 2 for from latching segment, 3 for interlocking portions, 4 for operating part, 5 for detect the blind area, 6 for voltage acquisition control unit, 7 be main with circuit 1 lead-out terminal, 8 be main be that redundant circuit input end, ZYDY are that primary power cource, BYDY are that backup power, GLB are that isolating transformer, ZYQF are that the master is the redundant circuit switch with contactor, BYQF with circuit 2 lead-out terminals, 9.

Characteristics through running experiment proof this programme are: simple in structure, self-locking and interlocking reliable operation, can guarantee the long safe operation of electric power system, be subjected to user's favorable comment.

Claims (1)

1. the highly reliable electric power system that has a cover redundant circuit that the railway system uses, the voltage acquisition control unit that it is characterized in that it is made up of detection, interlocking, self-locking, execution four parts, its test section is made up of rectifying circuit, photoswitch 1U1 and switching valve 1Q1, its rectifying circuit connects main lead-out terminal with circuit, the dc terminal of putting in order out meets photoswitch 1U1 through filter, its output connects the base stage of switching valve 1Q1 through stabilivolt 1Z1, to detect whether main lead-out terminal with circuit is charged mode of operation; Latching circuit is made up of the midget relay 1JQX1 of switching valve 1Q1 control, and the conducting of switching valve 1Q1 makes midget relay 1JQX1 devote oneself to work, and its an open contact ground connection maintains midget relay 1JQX1 and is stabilized in mode of operation; Interlock circuit is oppositely to insert diode 2D4 between the base stage of the collecting electrode of testing circuit switching valve 1Q1 and detector switch pipe 2Q1, and oppositely insert diode 1D4 between the base stage of the collecting electrode of testing circuit switching valve 2Q1 and detector switch pipe 1Q1, with the active potential of the switching valve collecting electrode of conducting the base potential of another pipe is dropped to 0; Its operating part is made up of the relay 1JQX2 of midget relay 1JQX1 and operating part, when midget relay work makes the relay of operating part devote oneself to work, redundant circuit connect to.

Images